import java.util.LinkedList;
import java.util.List;

/**
 * @Author Fish Paradise
 * @Description
 * @Date 2019/1/29  14:43
 **/
public abstract class UnitedNations {
    protected List<Country> countryList= new LinkedList<>();
    public void regist(Country country){
        countryList.add(country);
    }

    public void remove(Country country){
        countryList.remove(country);
    }

    protected abstract void declare(Country country,String msg);
}
